Abstract [en]

The acute ozone induced lung injury model has been widely used to explore injury and repair processes induced by oxidant overload. The current study evaluated acute ozone exposure effects on prostaglandin F-2 alpha (PGF(2 alpha)) in male Fischer rat plasma and urine with the hypothesis that ozone may induce an inflammatory response in the body that can be measured by the induction of PGF2 alpha. That might then lead to the identification of potential marker for acute lung injury through systemic inflammation. The time and dose-dependent effects of ozone exposure on the plasma and urinary levels of a major PGF(2 alpha) metabolite15-keto-dihydro-PGF(2 alpha) were determined using a radioimmunoassay. No statistically significant differences in the PGF(2 alpha) metabolite were found between the control and the experimental groups at either ozone exposure dose (2 ppm and 5 ppm) or any time point (2 h, 7 h and 16 h) post exposure for plasma and at 7 different post exposure time points (between 2 and 80 h) for urine. It is concluded that acute ozone exposure does not cause changes in plasma and urinary PGF(2 alpha), and therefore their measurement in plasma and urine may not be used to reveal pulmonary inflammation and damage by ozone.